Test performed to unknown salt solution Addition of 3 M (NH4)2CO3 reagent Addition of 3% sodium tetraphenylborate Ammonia-formation test Flame test Result no precipitate was formed. precipitate formed red litmus paper did not change in color purple flame A) Na* B) Ca2+ D) NH4*

Test performed to unknown salt solution Addition of 3 M (NH4)2CO3 reagent Addition of 3% sodium tetraphenylborate Ammonia-formation test Flame test Result no precipitate was formed. precipitate formed red litmus paper did not change in color purple flame A) Na* B) Ca2+ D) NH4*

Fundamentals Of Analytical Chemistry

9th Edition

ISBN:9781285640686

Author:Skoog

Publisher:Skoog

Chapter16: Applications Of Neutralization Titrations

Section: Chapter Questions

Problem 16.40QAP

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Question

Identify the unknown solution provided in these 2 problems

Test performed to unknown salt solution
Addition of 3 M (NH4)2CO3 reagent
Addition of 3% sodium tetraphenylborate
Ammonia-formation test
Flame test
Result
no precipitate was formed.
precipitate formed
red litmus paper did not change in color
purple flame
A) Na*
B) Ca2+
D) NH4*

Test performed to unknown salt solution
Addition of 3 M (NH4)2CO3 reagent
Addition of 1 M K½CrO4 reagent
Flame test
Result
...
a white precipitate was formed.
no precipitate formed
orange-red flame
A Mg2*
(B Ba2+
C) NH4*
D Ca2+

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